JP2510816Y2 - Temporary ink reservoir - Google Patents

Description

[Detailed description of the invention] (Industrial application field) In supplying the ink stored in the ink tank to the pen tip, the main purpose is to suppress ink dripping from the pen tip due to changes in temperature and pressure. The present invention relates to a temporary ink storage member disposed between an ink tank and a pen tip.

(Prior Art) As represented by a typical fountain pen, an ink reservoir is placed between the ink tank and the pen tip for the purpose of preventing ink dripping from the pen tip due to changes in temperature and atmospheric pressure. It is normal to use a temporary ink reservoir member that temporarily retains ink and that has a flat thin-walled portion having a comb-teeth-shaped vertical cross section that forms a groove and a slit-shaped ink groove that communicates with the ink reservoir. Has become. This member, that is, the temporary ink reservoir member, has various contrivances, for example, to increase the booklet portion having a comb-teeth shape in the vertical cross section or to reduce the distance between the comb teeth in order to sufficiently exert its function. Has been applied.

(Problems to be solved by the invention) Certainly, there are many writing instruments having sufficient quality due to various measures for the temporary ink reservoir member, but they are not enough yet.

The biggest problem is that there is no writing instrument that can hold a large amount of ink. For example, the ink tank of a fountain pen currently on the market has a capacity of 1cc or at most 2cc.
It is of a degree. This is because the function of the temporary ink fountain member requires the use of a temporary ink fountain member capable of storing a large volume of ink in order to accommodate a large volume of ink.

By the way, such a temporary ink reservoir member is generally obtained as a synthetic resin injection molded product, but the portion corresponding to the gap between the booklet parts of the split mold used for injection molding is Since the ink must be gripped by the capillary force, it is usually necessary to form the ink as thin as 0.2 to 0.3 mm. Further, the number of the portions corresponding to the gap between the booklet portions must be increased in order to obtain a large amount of ink. For this reason, the strength of the portion corresponding to the gap between the booklet portions is small and it is easily deformed, so that the split mold used for injection molding is difficult to pull out, and the workability is poor.

(Means for Solving the Problems) The present invention has a pressure in an ink tank, which has a book-like portion having a comb-like shape in a vertical cross-section that forms an ink reservoir and a slit-shaped ink groove that communicates with the ink reservoir. In a temporary ink reservoir member that temporarily stores ink according to changes, the booklet portions are arranged in a curved plate shape, and the ink reservoir portion is formed as a space partitioned into a curved surface shape. The purpose is to provide a temporary ink reservoir member.

(Example) Hereinafter, based on the attached FIGS. 1 to 4 showing an example,
explain.

Reference numeral 1 denotes a temporary ink reservoir, and the temporary ink reservoir 1 is appropriately formed with a fiber converging body and an ink passage connected to a rear portion of a pen tip (not shown) or a rear portion of the pen tip. A through hole 1a into which an ink relay member (not shown) made of a molded product or the like is inserted is formed. That is, the through-hole 1a connects the ink tank (not shown) side and the pen tip side, and thus becomes the original passage of the ink for writing. Reference numeral 1b indicates a book portion, which is for forming an ink reservoir. That is, the gap between the booklet portions 1b is a portion where ink is temporarily stored. The book flesh portion 1b has a comb-shaped vertical cross section and is formed as a plurality of thin wall portions juxtaposed with each other or as a spiral thin wall portion. The book meat portion 1b is a state in which a plurality of curved plates are arranged at a certain interval, and each of the book meat portions 1b has a stronger strength during molding.
The deformation can be prevented, and the capacity can be increased as compared with the temporary ink reservoir member having the same width and the same height. The curved surface may be smooth as shown in FIG. 1 or may be angular (see FIG. 2).
From the viewpoint of the storage capacity, the difference between the convex portion and the concave portion of the booklet portion 1b is preferably equal to or less than the gap between the booklet portion 1b.

1c indicates a slit-shaped ink groove, but it is not preferable to make the capillary force of the ink reservoir portion stronger than the capillary force of the ink groove 1c.

In this example, 1d indicates a communicating portion formed as an opening of the ink groove 1c to the through hole 1a (see FIGS. 3 and 4), but this communicating portion 1d is located in the ink groove 1c. It is for guiding the ink, and does not necessarily have to be formed as a part of the ink groove 1c, and instead of being opened in the through hole 1a, it should be connected to an ink tank separately from the through hole 1a. It may be done.

As described above, in the illustrated example, the thickness ink groove of the booklet portion 1b
Although the width of 1c and the like are depicted as being constant in each case, the thickness and width may be changed as long as it can function sufficiently in practice.

Reference numeral 1e is an air exchange groove formed as a concave portion extending in the front-rear direction of the temporary ink reservoir member 1.
The air exchange groove 1e is not always necessary, but it is preferable that the air exchange groove 1e exists due to the relationship with the shape of the temporary ink reservoir member itself.

Reference numeral 1f is a recess formed from the viewpoint of formability, but it is also possible to use this recess 1f as an air exchange groove.

In the above-mentioned example, the temporary ink reservoir member has a substantially elliptical cross-sectional shape, but it may of course have a conventionally known circular cross-sectional shape, and the ink tank has a general capacity. Of course, the present invention can be applied to the case of a static capacity.

In order to obtain the temporary ink reservoir member according to the present invention, it is preferable that the temporary ink reservoir member is formed by injection molding, and the portion corresponding to the gap between the booklet portions of the split mold used for injection molding is formed into a curved surface shape. It may be removed in the vertical direction of the drawing.

(Effect of the Invention) The temporary ink reservoir member of the present invention is excellent in terms of molding, and also exerts a good function as a reservoir of a large amount of ink.

[Brief description of drawings]

FIG. 1 is a side view showing an example of the temporary ink reservoir member of the present invention, FIG. 2 is a side view showing another example of the present invention, and FIG. 3 is a 90 ° view of the temporary ink reservoir member of FIG. FIG. 4 is a partially cutaway vertical sectional view when rotated, and FIG. 4 is a lateral sectional view taken along the line I-I of FIG. 3. 1 ... Temporary ink reservoir member, 1b ... Book part, 1c ... Ink groove,

Claims (1)

(57) [Scope of utility model registration request] 1. An ink tank having a thin portion having a comb-like vertical cross-section forming an ink reservoir and a slit-shaped ink groove communicating with the ink reservoir, the ink being temporarily stored in accordance with a pressure change in the ink tank. A temporary ink reservoir member for accumulating, wherein the thin portions are arranged in a curved plate shape, and the ink reservoir portion is formed as a space partitioned into a curved surface.